This eyeglass chain is approximately 62cm long and features five magnetic beads at the back of the neck, which are expected to help prevent stiff shoulders. It uses blue beads and weighs 12.6g. - Color: Blue系 (Blue tones) - Materials: Magnetic beads, glass beads, beads, silicone fasteners - Design: Multi-layered - Purpose: Eyeglass chain No pets, no smoking. Measurements are approximate due to being done by a non-professional. No claims, no returns. Thank you for looking.